effective half-word

例句：

1. 1. The new policy isexpected to be effective in reducing pollution.
   新政策预计将有效减少污染。
2. 2. Themedicine is effective for treatingthe common cold.
   这种药对治疗普通感冒是有效的。
3. 3. The manager's suggestion was effective in solving theproblem.
   经理的建议在解决问题上是有效的。